Scholarlink

<p>The Yellow Bean Collection (YBC) comprised of mainly yellow bean genotypes of common bean (<i>Phaseolus vulgaris</i> L.) is a major genetic and breeding resource. The genetic basis of variation for seed yield and assimilate partitioning efficiency in the YBC is not known. The objective of this study was to identify genomic regions associated with seed yield and partitioning efficiency namely harvest index (HI) and pod harvest index (PHI) in the YBC. A total of 250 YBC accessions were evaluated for seed yield, number of pods per plant, seed weight, PHI and HI in field trials. Genome-wide association analysis was conducted using 72,866 single nucleotide polymorphism markers (SNPs) and mixed linear model. Broad sense heritability was estimated for seed yield (0.25–0.64), number of pods per plant (0.41), seed weight (0.92), PHI (0.37) and HI (0.38). SNPs significantly associated with seed yield were identified on chromosomes Pv02, Pv04, Pv07 and Pv08. The variation explained by seed yield QTL ranged from 10.9 to 19.8%. Significant SNPs for PHI were identified on Pv04 (<i>R</i><sup>2</sup> = 22.6%), Pv07 (<i>R</i><sup>2</sup> = 29.6%), and Pv10 (<i>R</i><sup>2</sup> = 27.6%), the genomic region on Pv07 was also significant for HI (<i>R</i><sup>2</sup> = 20.1%). The identified seed yield QTL on Pv02 and Pv07, and HI QTL on Pv07 co-localized with previously reported QTL, validating their importance. The identified large-effect QTL could potentially be used in developing DNA markers for efficient selection of seed yield and assimilate partitioning efficiency.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Genome-wide association analysis for seed yield and partitioning efficiency in the yellow bean collection of common bean

  • 期刊论文

  • 发表日期：

    2026年4月28日

查看全文
  • Lawrence Chanda,
  • Swivia Hamabwe,
  • Gideon Munduwe,
  • Kuwabo Kuwabo,
  • Paul Kachapulula,
  • Travis Parker,
  • Kelvin Kamfwa

摘要

The Yellow Bean Collection (YBC) comprised of mainly yellow bean genotypes of common bean (Phaseolus vulgaris L.) is a major genetic and breeding resource. The genetic basis of variation for seed yield and assimilate partitioning efficiency in the YBC is not known. The objective of this study was to identify genomic regions associated with seed yield and partitioning efficiency namely harvest index (HI) and pod harvest index (PHI) in the YBC. A total of 250 YBC accessions were evaluated for seed yield, number of pods per plant, seed weight, PHI and HI in field trials. Genome-wide association analysis was conducted using 72,866 single nucleotide polymorphism markers (SNPs) and mixed linear model. Broad sense heritability was estimated for seed yield (0.25–0.64), number of pods per plant (0.41), seed weight (0.92), PHI (0.37) and HI (0.38). SNPs significantly associated with seed yield were identified on chromosomes Pv02, Pv04, Pv07 and Pv08. The variation explained by seed yield QTL ranged from 10.9 to 19.8%. Significant SNPs for PHI were identified on Pv04 (R2 = 22.6%), Pv07 (R2 = 29.6%), and Pv10 (R2 = 27.6%), the genomic region on Pv07 was also significant for HI (R2 = 20.1%). The identified seed yield QTL on Pv02 and Pv07, and HI QTL on Pv07 co-localized with previously reported QTL, validating their importance. The identified large-effect QTL could potentially be used in developing DNA markers for efficient selection of seed yield and assimilate partitioning efficiency.